From patchwork Fri Jul 23 08:16:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Billy Tsai X-Patchwork-Id: 12395485 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 57014C4338F for ; Fri, 23 Jul 2021 08:17:49 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 285ED60EBD for ; Fri, 23 Jul 2021 08:17:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 285ED60EBD Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=aspeedtech.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=G+Cm9Lw+ZdWOS1ojzgAnIr0I1C3zBuoVMZcEEaJA/Dw=; b=DtKYhq2RLKqeAU KTAkR6D9HaWkMspYzl8rBHYhpE+bgvSTCkllqPRnUxfNWBfWGQWURKj2pzAg6/Gyu/8LSovUGHwH2 XIaSHyEOPiO7AoR+hM7J/9zCJKbgAKjeyg2vuCvkG1HuHV0REXIhwmdiiTEvC34rFzUujkuYn6zs7 rrXBrS0qtug7ydUHCAUAg7jWap//P1l5q1ko/nRCARR7we6WyvbXL+QU0qFbQn0WTuHj/dSaE6WXr ELdbl//3IHTQWQYhwSSpD6ROSmdboshEMBvCqERsdXkw0SogKvdd3zy7A+cw9eksmWgTQBQk1SjKK gGVKk6wBqioXjRou0QEg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m6qLu-003qZy-BQ; Fri, 23 Jul 2021 08:16:14 +0000 Received: from twspam01.aspeedtech.com ([211.20.114.71]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1m6qLg-003qVe-1B for linux-arm-kernel@lists.infradead.org; Fri, 23 Jul 2021 08:16:01 +0000 Received: from mail.aspeedtech.com ([192.168.0.24]) by twspam01.aspeedtech.com with ESMTP id 16N7x5V2041949; Fri, 23 Jul 2021 15:59:05 +0800 (GMT-8) (envelope-from billy_tsai@aspeedtech.com) Received: from BillyTsai-pc.aspeed.com (192.168.2.149) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 23 Jul 2021 16:15:39 +0800 From: Billy Tsai To: , , , , , , , , , , , CC: Subject: [v2 2/8] dt-bindings: iio: adc: Binding ast2600 adc. Date: Fri, 23 Jul 2021 16:16:15 +0800 Message-ID: <20210723081621.29477-3-billy_tsai@aspeedtech.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210723081621.29477-1-billy_tsai@aspeedtech.com> References: <20210723081621.29477-1-billy_tsai@aspeedtech.com> MIME-Version: 1.0 X-Originating-IP: [192.168.2.149] X-ClientProxiedBy: TWMBX02.aspeed.com (192.168.0.24) To TWMBX02.aspeed.com (192.168.0.24) X-DNSRBL: X-MAIL: twspam01.aspeedtech.com 16N7x5V2041949 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210723_011600_380707_26A4C973 X-CRM114-Status: GOOD ( 10.38 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This patch add more description about aspeed adc and add two property for ast2600: - vref: used to configure reference voltage. - battery-sensing: used to enable battery sensing mode for last channel. Signed-off-by: Billy Tsai --- .../bindings/iio/adc/aspeed,adc.yaml | 28 +++++++++++++++++-- 1 file changed, 26 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/iio/adc/aspeed,adc.yaml b/Documentation/devicetree/bindings/iio/adc/aspeed,adc.yaml index 23f3da1ffca3..a562a7fbc30c 100644 --- a/Documentation/devicetree/bindings/iio/adc/aspeed,adc.yaml +++ b/Documentation/devicetree/bindings/iio/adc/aspeed,adc.yaml @@ -10,14 +10,26 @@ maintainers: - Joel Stanley description: - This device is a 10-bit converter for 16 voltage channels. All inputs are - single ended. + • 10-bits resolution for 16 voltage channels. + At ast2400/ast2500 the device has only one engine with 16 voltage channels. + At ast2600 the device split into two individual engine and each contains 8 voltage channels. + • Channel scanning can be non-continuous. + • Programmable ADC clock frequency. + • Programmable upper and lower bound for each channels. + • Interrupt when larger or less than bounds for each channels. + • Support hysteresis for each channels. + • Buildin a compensating method. + Additional feature at ast2600 + • Internal or External reference voltage. + • Support 2 Internal reference voltage 1.2v or 2.5v. + • Integrate dividing circuit for battery sensing. properties: compatible: enum: - aspeed,ast2400-adc - aspeed,ast2500-adc + - aspeed,ast2600-adc reg: maxItems: 1 @@ -33,6 +45,18 @@ properties: "#io-channel-cells": const: 1 + vref: + minItems: 900 + maxItems: 2700 + default: 2500 + description: + ADC Reference voltage in millivolts. + + battery-sensing: + type: boolean + description: + Inform the driver that last channel will be used to sensor battery. + required: - compatible - reg